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- /*
- * Copyright (C) 2006 Atmel Corporation
- *
- * SPDX-License-Identifier: GPL-2.0+
- */
- #ifndef __ASM_AVR32_SDRAM_H
- #define __ASM_AVR32_SDRAM_H
- struct sdram_config {
- /* Number of data bits. */
- enum {
- SDRAM_DATA_16BIT = 16,
- SDRAM_DATA_32BIT = 32,
- } data_bits;
- /* Number of address bits */
- uint8_t row_bits, col_bits, bank_bits;
- /* SDRAM timings in cycles */
- uint8_t cas, twr, trc, trp, trcd, tras, txsr;
- /* SDRAM refresh period in cycles */
- unsigned long refresh_period;
- };
- /*
- * Attempt to initialize the SDRAM controller using the specified
- * parameters. Return the expected size of the memory area based on
- * the number of address and data bits.
- *
- * The caller should verify that the configuration is correct by
- * running a memory test, e.g. get_ram_size().
- */
- extern unsigned long sdram_init(void *sdram_base,
- const struct sdram_config *config);
- #endif /* __ASM_AVR32_SDRAM_H */
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